Do you want to create a native client or integrate with third party applications: webservices are the solution.

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1- You should enable lucene araby analyzer ( some information here https://docs.openkm.com/kcenter/view/ok ... lyzer.html )
2- There's a method for downloading by version ( https://docs.openkm.com/kcenter/view/sd ... tByVersion )
3- Yes with crontab task or scripting ( I suppose you are looking for something like https://docs.openkm.com/kcenter/view/ok ... -file.html )
4- Yes ( but I'm not 100% sure if the feature is present in community version, should be able the feature from contextual menu -> right click in a document )
5- In the preview you might highlight text ( search ) but annotation are only available from professional version ( https://www.youtube.com/watch?v=4mGpA6ST578 )
6- Only with professional version this feature has not still released into community.
7- Not possible, but in professional version you can extend the webservices API ( there is possible then to implement it ). Might be in community version you are able to download zip file, if you investigate the url might be you can get the same result.
8- Same as point 7

1- You should enable lucene araby analyzer ( some information here https://docs.openkm.com/kcenter/view/ok ... lyzer.html )
2- There's a method for downloading by version ( https://docs.openkm.com/kcenter/view/sd ... tByVersion )
3- Yes with crontab task or scripting ( I suppose you are looking for something like https://docs.openkm.com/kcenter/view/ok ... -file.html )
4- Yes ( but I'm not 100% sure if the feature is present in community version, should be able the feature from contextual menu -> right click in a document )
5- In the preview you might highlight text ( search ) but annotation are only available from professional version ( https://www.youtube.com/watch?v=4mGpA6ST578 )
6- Only with professional version this feature has not still released into community.
7- Not possible, but in professional version you can extend the webservices API ( there is possible then to implement it ). Might be in community version you are able to download zip file, if you investigate the url might be you can get the same result.
8- Same as point 7

Thanks for the Clarifications on the above points. you guys are great!!!

Sure Not possible, but in professional version you can extend the webservices API ( there is possible then to implement it ). Might be in community version you are able to download zip file, if you investigate the url might be you can get the same result.